-Original Message-
From: Ken Javor [ mailto:ken.ja...@emccompliance.com]
Sent: Tuesday, November 04, 2003 4:03 PM
To: Bill Stumpf; 'emc-p...@majordomo.ieee.org'
Subject: Re: RS-103 help
I am not sure if you are asking for specific equipment model
numbers, or
general guidance.
Hello Rich,
3. I believe you will have to use 3000Vac or 4242Vdc
between primary and
secondary side, unless you have a failure, then there
are steps to go
through to isolate the failure.
The adapter has basic insulation between mains
and the PE terminal, and reinforced
Howdy, Rich.
From: Rich Nute
Sent: Tuesday, November 04, 2003 2:25 PM
Hi Peter:
No where does the standard state that by
simply providing a
Functional Earth, even through an appliance
inlet (implying
use of a power supply cord), the equipment is
not considered
Class II.
I am not sure if you are asking for specific equipment model numbers, or
general guidance. I will leave the specifics to others. I would start with
a high gain horn and a calculation of how far away the far field is
developed (2D^2/wavelength). You can use the equation for power density as
a
Hi Chengwee:
In my years working in power supply industry, I have never done the ground
continuity test between Earth terminal to the DC output for adaptor.
Normally I wouldn't trust the PE path with anything less than 18AWG or
equivalent.
There are two kinds of tests that I
Hi Peter:
No where does the standard state that by simply providing a
Functional Earth, even through an appliance inlet (implying
use of a power supply cord), the equipment is not considered
Class II. One is simply limited to not marking with the
aforementioned symbol.
Hello all. I need help locating equipment for rent that can achieve the
following goals. RS-103 (MIL-STD-461E) testing from 18 GHz to 40 GHz @
200V/m. If anyone could point me in the right direction I would be most
grateful.
Bill Stumpf
William M Stumpf
DLS Electronics
166 South Carter St.
Hello Rich,
Agree to the compliance thought process for PE according to the 60950
standard.
In my years working in power supply industry, I have never done the ground
continuity test between Earth terminal to the DC output for adaptor.
Normally I wouldn't trust the PE path with anything less
Hi John:
I do have one question for the group just for my own knowledge...back in my
TUV days I worked almost exclusively with IEC60950 and seem to remember
that
a class II product can have a functional earth connection provided Primary
and other hazardous voltages are insulated
Raymond -
I'm not Rich, but see the below.
From: raymond...@omnisourceasia.com.hk
Sent: Monday, November 03, 2003 10:18 PM
Rich,
If the dc output is connected to the PE terminal,
then the dc output could become live in the event
of a fault in the basic insulation between mains
and the
Hi Raymond:
If the dc output is connected to the PE terminal,
then the dc output could become live in the event
of a fault in the basic insulation between mains
and the PE terminal.
I think it may not be the case in practice. Even the dc output is
connected to the
John -
IEC60950-1, ยง2.6.2 deals with Functional Earthing. If the
earthing is functional only, it does need to be separated by
Double or Reinforced Insulation, or by earthed screening and
Basic Insulation, from parts at hazardous voltage.
Just as for Pluggable Equipment/Class I Equipment, when
What are the agency requirements on the SNUBBER caps used with TRIAC
controllers for AC applications. This design will be used in both a North
American 115 V and a European 230 V ac system.
So the SNUBBER caps have to have any specific agency ratings? Will they need
to be Y capacitors for
Doug,
I find it confusing. Good thing there are examples.
example b) gives the correct answer.
example a) does not look correct.
Reasoning:
1) F is solved incorrectly. It should be 0.297
2) The remainder looks correct. I get 20.5 mm (without interpolation)
With interpolation I get
Great answers Rich!
I do have one question for the group just for my own knowledge...back in my
TUV days I worked almost exclusively with IEC60950 and seem to remember that
a class II product can have a functional earth connection provided Primary
and other hazardous voltages are insulated from
Yes,
its ITE equipment - laboratory, scientific or measurement equipment,
whichever e.g EN55022/CIPR 22 or equivalent, unless the vehicle is moving when
you normally use it; and in which case 95/54/EC then applies.
-Original Message-
From: Luke Turnbull [
Does anyone have an opinion on what commercial EMC standards I should apply to
a product that reads and writes information via a vehicle diagnostic connector.
Thanks,
Luke Turnbull
This message is from the IEEE EMC Society Product Safety
Technical Committee emc-pstc discussion list.
Visit
SMPS
If a SMPS is available on the EU market for end users, then the EMC
directive applies
Otherwise only the LV directive applies.
This implies that an component SMPS need not meet the EMC reqs.
Your product however, does and a SMPS is a critial component
as it comes to EMC. Therefore only
Rich,
Many thanks for your clear explanation.
I have two practical issues in below in-line message and look forward to
hearing your comments.
To
c...@netscreen.com
cc
raymond...@omnisourceasia.com.hk, emc-p...@ieee.org
Subject
Re: Class 1 AC/DC adapter
If the
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